https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101378
Bug ID: 101378
Summary: Negative DW_AT_data_member_location
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: simon.marchi at polymtl dot ca
Target Milestone: ---
I'm at 1ca642d785c49e9e0b28651b190720267703f023 (current master).
$ cat test.cpp
#include <memory>
int main() {
std::unique_ptr<int> p(new int);
return 0;
}
$ /opt/gcc/git/bin/g++ test.cpp -g3 -O0
$ readelf --debug-dump a.out
...
<3><968>: Abbrev Number: 79 (DW_TAG_member)
<969> DW_AT_name : (indirect string, offset: 0xc214): _M_head_impl
<96d> DW_AT_decl_file : 4
<96e> DW_AT_decl_line : 125
<96f> DW_AT_decl_column : 39
<970> DW_AT_type : <0x67e>
<974> DW_AT_data_member_location: -1
...
The -1 DW_AT_data_member_location value looks wrong. Previous gcc versions
would say 0, which makes more sense. It doesn't seem to change anything
whether I use DWARF 4 or 5.
Related GDB bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28063
